GoolRC Step Drill Bit Set - high speed steel 4241 5pcs

This set of step drills made of superb steel material. Different specifications can meet different drilling requirements. What are you waiting for? Just come and buy. Specifications: Material: high speed steel 4241 Color: yellow Quantity: 5pcs Type: 1, 2 (optional) Size: 1/4" to 1-3/8" (10 steps): 1/4", 3/8" 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8" 3/16" to 7/8" (12 steps): 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8" 1/4" to 3/4" (9 steps): 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4" 1/8" to 1/2" (13 steps): 1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2" 3/16" to 1/2" (6 steps): 3/16", 1/4", 5/16", 3/8", 7/16", 1/2" Shank diameter: 1/4" to 1-3/8": 8mm / 0.3in 3/16" to 7/8": 8mm / 0.3in 1/4" to 3/4": 8mm / 0.3in 1/8" to 1/2": 6mm / 0.2in 3/16" to 1/2": 6mm / 0.2in Package size: Type 1: 150 * 110 * 40mm / 5.9 * 4.3 * 1.6inches(Length * Width * Height) Type 2: 90 * 70 * 70mm / 3.5 * 2.8 * 2.8inches(Length * Width * Height) Package weight: Type 1: 480g / 1.1lb Type 2: 300g / 10.6ounce Package list: (optional) Type 1: 5 * Step Drill 1 * Aluminum Box or Type 2: 5 * Step Drill